Refactor some utils.go; add another tool 'tiledump'

README.md

@@ -1,20 +1,25 @@
 # ctfetch
 
-Fetch and dump leaf entries from Certificate Transparency logs.
+Tools for working with Certificate Transparency log tiles.
 
 ## Install
 
 ```bash
 go install ./cmd/ctfetch
+go install ./cmd/tiledump
 ```
 
-## Usage
+## Commands
+
+### ctfetch
+
+Fetch and dump leaf entries from CT logs.
 
 ```bash
 ctfetch [--dumpall] <log-url> <leaf-index>
 ```
 
-### Examples
+**Examples:**
 
 Dump a specific entry:
 ```bash
@@ -26,6 +31,25 @@ Dump all entries in the tile:
 ctfetch --dumpall https://halloumi2026h1.mon.ct.ipng.ch 629794635
 ```
 
-## Options
-
+**Options:**
 - `--dumpall`: Dump all entries in the tile instead of just the specified leaf
+
+### tiledump
+
+Read a CT log tile file or URL and dump all entries.
+
+```bash
+tiledump <tile-file-or-url>
+```
+
+**Examples:**
+
+From a file:
+```bash
+tiledump tile.data
+```
+
+From a URL:
+```bash
+tiledump https://halloumi2026h1.mon.ct.ipng.ch/tile/data/x002/x460/135
+```