- Add platform abstraction layer for cross-platform builds
- Port termios_wrapper.c to use Windows Console API
- Port lsp_process_wrapper.c to use CreateProcess/CreatePipe
- Port regex_wrapper.c with simplified Windows matching
- Add platform_module.f90 and platform_wrapper.c for clipboard,
  temp directory, and path handling
- Update Makefile for MSYS2/MinGW detection
- Add GitHub Actions workflow for multi-platform CI builds

Multiline comments (/* */) and strings (""", `, etc.) were not
highlighted across multiple lines. This made reading C, JavaScript,
Python, and other languages difficult.

Also replaced stub panel renderers with real implementations so
document symbols and workspace symbols are now fully functional.

Removed 19 unused local variables across modules:
- syntax_highlighter, diagnostics_panel, input_handler
- lsp_server_manager, lsp_client, completion_popup
- hover_tooltip, signature_tooltip, renderer, command_handler

91% reduction in compiler noise - remaining 10 are intentional
(stub function parameters documenting incomplete implementations)

- Fix uninitialized delimiter bug in syntax highlighter
- Comment out 6 unused functions
- Restore standard cursor goal column behavior

Implements a comprehensive language server management system inspired by
Neovim's Mason, providing users an easy way to discover and install LSP
servers directly from the editor.

Features:
- First-run experience: LSP Server Manager automatically appears on first launch
- Alt+M keybinding: Toggle the manager panel anytime
- 20 language servers supported including Python, C/C++, Rust, Go, JavaScript/TypeScript, Lua, Ruby, Java, and more
- Installation with confirmation: Select a server, press Enter to see install command, Y to confirm
- Server status detection: Uses 'which' to detect installed servers
- Navigation: j/k or arrows to navigate, r to refresh, Esc/q to close
- State persistence: First-run state stored in ~/.config/fac/state.json

New modules:
- src/workspace/app_state_module.f90: First-run detection and state persistence
- src/lsp/server_detection_module.f90: Detect installed language servers
- src/lsp/server_installer_module.f90: Execute installation commands
- src/ui/lsp_server_installer_panel_module.f90: Modal UI panel

Additional fixes:
- Fixed modal panel border alignment (Command Palette & LSP Server Manager)
- Removed circular dependency in unified_search_module
- Updated Makefile with new modules in correct dependency order

Adds comprehensive Language Server Protocol (LSP) integration:

LSP Features:
- Auto-completion (Ctrl+Space)
- Hover Information (Ctrl+H)
- Go to Definition (F12)
- Find References (Shift+F12)
- Rename Symbol (F2)
- Code Actions (Ctrl+.)
- Document Symbols (Ctrl+Shift+O)
- Workspace Symbols (F6)
- Signature Help (auto on '(' and ',')
- Real-time Diagnostics (F8/Shift+F8)
- Document Formatting (Shift+Alt+F)

UI Enhancements:
- Command Palette (Ctrl+P) - top-center VSCode style
- Syntax highlighting for Python, C, Fortran, Rust, Go, JS/TS
- Off-canvas panels for references, symbols, diagnostics
- Search: Ctrl+F cycling, history, match case/word/regex toggles

Multi-Server Architecture:
- Concurrent language server support
- Server-attributed diagnostics
- Automatic server detection and lifecycle management

Bug Fixes:
- Tab/buffer sync issues on F6 navigation
- Cursor position after Shift+F12 jump
- Viewport update on search cycling
- Multiple rename on same symbol
- Code actions applying to wrong tab

# Conflicts:
#	.gitignore

- Fix Alt+. code actions for all tabs by sending LSP didOpen notification
  when tabs are created via file tree, jump-to-definition, or workspace restore
- Fix Enter key double-processing on offcanvas panels (code actions, references,
  symbols) - Enter was both executing action AND inserting newline in editor
- Fix Fortran syntax highlighting when switching between file types by auto-
  updating the syntax highlighter when editor filename changes
- Enable CAP_CODE_ACTIONS for Fortran (fortls)
- Remove extensive debug logging from command_handler_module.f90 (550+ lines)

- Multiple LSP servers per file type (Pyright + Ruff for Python)
- Capability-based request routing (rename→Pyright, code actions→Ruff)
- Diagnostics track source server; code actions only see own diagnostics