Update README and update tests that need to run sequencially

README.md

@@ -1,3 +1,46 @@
 # Fishee
 
-Fishee CLI Tool for Fish Shell
+Fishee CLI Tool for Fish Shell
+
+## About Fishee
+
+So I have been a user of Fish Shell for quite a while now and really enjoy using it. 
+
+So I decided to write this CLI tool for Fish Shell that helps me manage my fish history.
+
+## Features
+
+- Print my fish history
+- Merge two history files into one
+    - Useful for when you want to add fish history from one computer to another
+- remove duplicates from history file when merging
+
+## Usage
+
+In terminal run:
+
+```
+fishee --help
+```
+
+```
+USAGE: fishee [--history-file <history-file>] [--merge-file <merge-file>] [--output-file <output-file>] [--dry-run] [--remove-duplicates] [--backup] [--no-backup]
+
+OPTIONS:
+  -f, --history-file <history-file>
+                          Location of your fish history file. Will default to
+                          ~/.local/share/fish/fish_history
+  -m, --merge-file <merge-file>
+                          File path to file to merge with history file.
+  -w, --output-file <output-file>
+                          File to write to. Default: same as current history
+                          file.
+  -d, --dry-run           Dry run. Will only print to the console without
+                          actually modifying the history file.
+  -r, --remove-duplicates Remove duplicates from combined history. Default:
+                          false
+  -b, --backup/--no-backup
+                          Backup fish history file given before writing.
+                          (default: --backup)
+  -h, --help         
+```

Tests/FileHelpersTests.swift

@@ -19,6 +19,7 @@ import Testing
 @testable import Fishee
 
 
+@Suite(.serialized)
 final class FileHelpersTests {
     let filePath = FileManager.default.homeDirectoryForCurrentUser.appendingPathComponent("myfile.txt")
     

Tests/ParserTests.swift

@@ -18,7 +18,7 @@ import Foundation
 import Testing
 @testable import Fishee
 
-@Suite
+@Suite(.serialized)
 final class ParserTests {
     let fishHistoryFile = Bundle.module.path(forResource: "fish_history_test", ofType: "txt")
     let historyItem = FishHistoryEntry(cmd: "cd Projects/Fishee/", when: 1727545693, paths: ["Projects/Fishee/"])