ARMv5TE (DS) support (#68)

* Initial ARM support

* Disassemble const pool reloc

* Disasm ARM/Thumb/data based on mapping symbols

* Fallback to mapping symbol `$a`

* Support multiple DWARF sequences

* Update line info

* Rework DWARF line info parsing

- Properly handles multiple sections
  in DWARF 1
- line_info moved into ObjSection
- DWARF 2 parser no longer errors with
  no .text section
- Both parsers properly skip empty
  sections

* Simplify line_info (no Option)

* Get line info from section; output formatted ins string

* Unwrap code section in `arm.rs`

* Handle reloc `R_ARM_SBREL32`

* Update ARM disassembler

* Update README.md

* Format

* Revert "Update README.md"

This reverts commit 8bbfcc6f45.

* Update README.md

---------

Co-authored-by: Luke Street <luke.street@encounterpc.com>

Cargo.lock

@@ -3124,6 +3124,7 @@ dependencies = [
  "serde_yaml",
  "similar",
  "strum",
+ "unarm",
 ]
 
 [[package]]
@@ -4695,6 +4696,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "unarm"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c13fc9a9c95348bf7565e5c30688fc288239962958cac0ccdc7cd009141d850"
+
 [[package]]
 name = "unicase"
 version = "2.7.0"