DOC-1065: Update Todoist credentials to medium tier template

[freakwriter]

Removed prerequisite section, converted bullet point list to more detailed numbered instructions.

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Overall readability score: 43.1 (🟢 +0.01)

File	Readability
todoist.md	55.89 (🟢 +15.3)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [todoist.md](https://github.com/n8n-io/n8n-docs/blob/6e4fe2ff67a95b6fa8b8d46345105c51567151f2/docs/integrations/builtin/credentials/todoist.md "docs/integrations/builtin/credentials/todoist.md") | 55.89 | 35.13 | 8.25 | 13.5 | 14.77 | 6.85   | 🟢 +15.3 | 🟢 +8.46 | 🟢 +1.11 | 🟢 +2.8 | 🟢 +2.96 | 🟢 +1.17 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 43.1 | 34.81 | 11.67 | 14.88 | 14.37 | 8.54   | 🟢 +0.01 | 🟢 +0.01 | 🟢 +0 | 🟢 +0 | 🟢 +0 | 🟢 +0

View metric targets

Metric | Range | Ideal score --- | --- | --- Flesch Reading Ease | 100 (very easy read) to 0 (extremely difficult read) | 60 Gunning Fog | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Auto. Read. Index | 6 (very easy read) to 14 (extremely difficult read) | 8 or less Coleman Liau Index | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Dale-Chall Readability | 4.9 (very easy read) to 9.9 (extremely difficult read) | 6.9 or less