Implement custom tabline with configurable path shortening

Add a custom tabline function to enhance path display in Neovim.
Users can configure the number of full parent directories and the
length of shortened directory names for better context and
manageability.

README.md

@@ -2,6 +2,37 @@
 
 Living reference for session management, keymaps, commands, and plugin-specific features in this config.
 
+## Configuration Options
+
+### Tabline Display
+
+Custom tabline shows intelligent path shortening with two configurable options.
+
+**Location:** `lua/settings.lua` (configured via `utils.tabline_full_parents` and `utils.tabline_shorten_length`)
+
+**Configuration Options:**
+
+1. **`utils.tabline_full_parents`** (default: `1`) - Number of parent directories to show in full
+2. **`utils.tabline_shorten_length`** (default: `3`) - Number of characters to show for shortened directories
+
+**Examples:**
+
+With `full_parents = 1, shorten_length = 3`:
+- `/path/to/my/project/src/file.txt` → `pat/to/my/project/src/file.txt`
+
+With `full_parents = 2, shorten_length = 3`:
+- `/path/to/my/project/src/file.txt` → `pat/to/my/project/src/file.txt`
+
+With `full_parents = 1, shorten_length = 1`:
+- `/path/to/my/project/src/file.txt` → `p/t/m/project/src/file.txt`
+
+With `full_parents = 0, shorten_length = 3`:
+- `/path/to/my/project/src/file.txt` → `pat/to/my/pro/src/file.txt`
+
+The last N parent directories are shown in full, earlier directories are shortened to the specified number of characters. The filename itself is always shown in full.
+
+**To customize:** Edit `utils.tabline_full_parents` and `utils.tabline_shorten_length` values in `lua/settings.lua`
+
 ## Working Directory Behavior
 
 The working directory (`:pwd`) is locked to the directory where you opened Neovim and does NOT change when switching files: