feat(lsp, ui, core): refactor LSP initialization, improve config handling, and clean up TreeSitter

* LSP Client & Manager
  Refactored initialization flow to use internal state instead of passing params
  Added workspace_path and init_opts to LSPClient
  Simplified send_initialize_message() (no external args)
  Updated manager/client APIs to require explicit workspace_path and typed init_opts
  Improved client lifecycle handling and UI button toggling

* LSP Manager UI
  Added {user.home} substitution support in configs
  Use live editor buffer for JSON config parsing instead of static template
  Minor cleanup and formatting improvements

* Core Widgets
  Prevent external modification checks for buffer-only files in SourceFile
  Minor formatting cleanup in SourceView

* Plugins / Manifest
  Expanded manifest schema: added description and copyright, reordered fields

* Cleanup
  Removed TreeSitter compile script and TODO entry
  General code formatting and small consistency fixes

chore: remove unused TreeSitter tooling and related TODO entry

plugins/code/event-watchers/tree_sitter/compile.py

@@ -1,39 +0,0 @@
-from .libs.tree_sitter_language_pack import \
-    init, download, get_language, get_parser, available_languages, process, ProcessConfig
-
-# Optional: Pre-download specific languages for offline use
-#init(["python", "javascript", "rust"])
-
-# Get a language (auto-downloads if not cached)
-language = get_language("python")
-
-# Get a pre-configured parser (auto-downloads if needed)
-parser = get_parser("python")
-tree = parser.parse(b"def hello(): pass")
-print(tree.root_node)
-
-# List all available languages
-for lang in available_languages():
-    print(lang)
-
-
-# Extract file intelligence (auto-downloads language if needed)
-result = process(
-    "def hello(): pass",
-    ProcessConfig( language = "python")
-)
-print(f"Functions: {len(result['structure'])}")
-
-# Pre-download languages for offline use
-download(["python", "javascript"])
-
-# With chunking
-result = process(
-    source,
-    ProcessConfig(
-        language       = "python",
-        chunk_max_size = 1000,
-        comments       = True
-    )
-)
-print(f"Chunks: {len(result['chunks'])}")