chore: add some docs on script checks

Signed-off-by: James Petersen <jpetersenames@gmail.com>

Author: found-it

README.md

@@ -60,3 +60,7 @@ Exit code is **non-zero** if any check/group fails or errors.
 
 * Use `EDERA_PREFLIGHT_SKIP_GROUPS` to bypass slow or irrelevant checks.
 * Script-based checks must be **executable** and located in `EDERA_PREFLIGHT_SCRIPTS_DIR`.
+
+## Script Based Checks
+
+Check the scripts [README.md](./scripts/README.md)

scripts/README.md

@@ -0,0 +1,47 @@
+# Scripted Checks
+
+This directory contains **script-based preflight checks**.  
+Each script is executed as part of the `Scripted Checks` group when `EDERA_PREFLIGHT_SCRIPTS_DIR` points here.  
+
+---
+
+## Writing a Scripted Check
+
+A scripted check is just an **executable shell script** that follows two simple rules:
+
+1. **Set the check name** by printing a line starting with  
+
+```
+EDERA_PREFLIGHT_CHECK_NAME=<name>
+```
+
+This will be used in logs and results.
+
+2. **Exit with the correct status code**:  
+- `0` → check passed  
+- non-zero → check failed (the return code is reported)  
+
+---
+
+## Example
+
+```sh
+#!/bin/sh
+
+# Name shown in preflight output
+echo "EDERA_PREFLIGHT_CHECK_NAME=Should Pass"
+
+# Any other output is shown as context
+echo "it does pass"
+
+# Exit code decides the result
+exit 0
+```
+
+---
+
+## Notes
+
+* Scripts must be **executable** (`chmod +x script.sh`).
+* You can write in any language (bash, python, etc.) as long as it follows the rules above.
+* Errors such as missing files or runtime exceptions will show up as **Errored** checks in the output.

src/system/mod.rs

@@ -14,7 +14,7 @@ pub struct SystemChecks;
 
 impl SystemChecks {
     pub fn run_all(&self) -> CheckGroupResult {
-        let results = vec![self.enough_memory()];
+        let results = vec![self.enough_memory(), self.enough_disk()];
 
         let mut group_result = Passed;
         for res in results.iter() {
@@ -50,6 +50,12 @@ impl SystemChecks {
         }
         CheckResult::new(&name, result)
     }
+
+    fn enough_disk(&self) -> CheckResult {
+        let name = String::from("Enough Disk");
+        let mut result = Passed;
+        CheckResult::new(&name, result)
+    }
 }
 
 impl CheckGroup for SystemChecks {