Fix PWR-ICE framing

[mrene]

Adds a heuristic-based packet size detection in order to tolerate the PWR-ICE which use 70 bytes frames instead of 64.

refs #245

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	250806e
Status:	✅  Deploy successful!
Preview URL:	https://2361fdc1.minidsp-rs.pages.dev

View logs

[m-diers]

Verified:

#> ./target/release/minidsp --verbose probe --net
Probing for network devices...
Found: tcp:https://192.168.178.120:5333?name=PWR-ICE2%20%20%20%20%20%20%20%00

#> ./target/release/minidsp --tcp 192.168.178.120 probe
Found Generic with serial 900182 at tcp:https://192.168.178.120:5333 [hw_id: 0, dsp_version: 51]

#> ./target/release/minidsp --tcp 192.168.178.120
MasterStatus { preset: 0, source: NotInstalled, volume: Gain(-0.0), mute: false, dirac: false }
Input levels: 
Output levels:

#> ./target/release/minidsp --verbose --tcp 192.168.178.120
Sent: [31]
Sent: ReadHardwareId 
Recv: [31, 03, 00]
Recv: HardwareId { payload: [03, 00] }
Sent: [05, ff, a1, 01]
Sent: ReadMemory { addr: ffa1, size: 01 } 
Recv: [05, ff, a1, 33]
Recv: MemoryData(MemoryView { base: ffa1, data: [33] })
Sent: [05, ff, fe, 02]
Sent: ReadMemory { addr: fffe, size: 02 } 
Recv: [05, ff, fe, 00, b6]
Recv: MemoryData(MemoryView { base: fffe, data: [00, b6] })
Sent: [05, ff, d8, 09]
Sent: ReadMemory { addr: ffd8, size: 09 } 
Recv: [05, ff, d8, 00, 00, 00, 0MasterStatus { preset: 0, source: NotInstalled, volume: Gain(-0.0), mute: false, dirac: false }
Input levels: 
Output levels: 
0
, 00, 0a, 00, 37, 01]
Recv: MemoryData(MemoryView { base: ffd8, data: [00, 00, 00, 00, 00, 0a, 00, 37, 01] })