Add script for crate structure comparison

scripts/coverage_checker/README.md

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+# coverage_checker.py
+
+Script to support check of the function coverage by Component Integration Tests. Will be depreciated once requirements are available as that's our metric for CIT.
+
+``` text
+usage: coverage_checker.py [-h] [-v {PUB,PUB_CRATE,PUB_SELF,PUB_SUPER}] [-t {CRATE,MOD,STRUCT,ENUM,TYPE,TRAIT,FN,CONST_FN,ASYNC_FN,ALL_FN}] [-r REFERENCE] [-o OUTPUT] input
+
+Filter and compare Rust crate structure
+
+positional arguments:
+  input                 'cargo modules structure --package <package>' output file
+
+options:
+  -h, --help            show this help message and exit
+  -v {PUB,PUB_CRATE,PUB_SELF,PUB_SUPER}, --visibility {PUB,PUB_CRATE,PUB_SELF,PUB_SUPER}
+                        Visibility to filter (default: PUB)
+  -t {CRATE,MOD,STRUCT,ENUM,TYPE,TRAIT,FN,CONST_FN,ASYNC_FN,ALL_FN}, --item-type {CRATE,MOD,STRUCT,ENUM,TYPE,TRAIT,FN,CONST_FN,ASYNC_FN,ALL_FN}
+                        Item type to focus on (default: ALL_FN)
+  -r REFERENCE, --reference REFERENCE
+                        Reference result created by this script to copy comments from
+  -o OUTPUT, --output OUTPUT
+                        File to write output to (default: stdout)
+```
+
+## Prerequisities
+
+* [cargo-module](https://crates.io/crates/cargo-modules)
+  * Install by `cargo install cargo-modules`
+
+## Example usage
+
+`tabs 4` - required to display correctly tabs  
+`cd <inc_orchestrator_repo>`  
+`cargo modules structure --package orchestration | sed 's/\x1b\[[0-9;]*m//g' > input_report.txt` - sed is required to remove colored output  
+`python3 coverage_checker.py -r <older_orchestration_report> input_report.txt`  
+
+where <older_orchestration_report> can be found in this [discussion](https://github.com/qorix-group/inc_orchestrator_internal/discussions/212)
+
+Next, it should be checked manually in generated output if some uncovered/newly added functions in crate are now covered by tests with latest revision.