fix: remove semanticTokensProvider capability to prevent line out of range errors

The semantic tokens delta calculation had a bug where previous delta lines
were used instead of absolute lines, causing cumulative errors that led
to 'Invalid line: out of range' in Neovim's semantic token renderer.

Since semantic tokens were already disabled (full=false, range=false) but
Neovim still attempted to process them, remove the capability entirely
so Neovim doesn't set up the semantic token decoration provider at all.

src/main.lua

@@ -67,11 +67,6 @@ local capabilities = {
 	documentSymbolProvider = true,
 	diagnosticProvider = { relatedDocuments = {} },
 	textDocumentSync = 1,
-	semanticTokensProvider = {
-		full = false,  -- Disabled: was causing "Invalid line: out of range" errors
-		legend = { tokenTypes = semanticTokenTypes, tokenModifiers = semanticTokenModifiers },
-		range = false,
-	},
 	inlayHintProvider = { resolveProvider = false },
 	workspaceSymbolProvider = true,
 	documentFormattingProvider = true,